{"instruction": "You are an expert in event argument extraction. Please extract event arguments and their roles from the input that conform to the schema definition, which already includes event trigger words. If an argument does not exist, return NAN or an empty dictionary. Please respond in the format of a JSON string.", "schema": [{"event_type": "adverse event", "arguments": ["Combination.Drug", "Treatment.Disorder", "Treatment", "Effect", "Treatment.Duration", "Treatment.Time_elapsed", "Subject.Disorder", "Treatment.Route", "Treatment.Dosage", "Subject.Population", "Treatment.Drug", "Subject"]}], "input": "A 71-year-old man with paroxysmal atrial fibrillation who had a previous anterior myocardial infarction exhibited granulocytopenia 8 days following the administration of oral sustained-release procainamide (750 mg/day)."}
{"adverse event": [{"Combination.Drug": "NAN", "Treatment.Disorder": "paroxysmal atrial fibrillation", "Treatment": "oral sustained-release procainamide (750 mg/day)", "Effect": "granulocytopenia", "Treatment.Duration": "NAN", "Treatment.Time_elapsed": "8 days", "Subject.Disorder": "anterior myocardial infarction", "Treatment.Route": "oral", "Treatment.Dosage": "750 mg/day", "Subject.Population": "NAN", "Treatment.Drug": "sustained-release procainamide", "Subject": "A 71-year-old man with paroxysmal atrial fibrillation who had a previous anterior myocardial infarction"}]}